William schmitz



INVENT $4 ,g BY

ATTORNEY Nov. 2 1926.

W. SCHMITZ HEATING UNIT FOR PERMANENT HAIR WAVING Filed May 21, 1925 1 I. .TT 1 a. a 4 2 g R J, 0 4 I 3 a Z a i i /a f J M H l I I I W 1 I -l lllll I! I Paten ted Nov. 2, 1926.

UNITED: STATES PATENT OFFICE.

WILLIAM SCHMITZ, OF NEW YORK, N; Y.,-ASS IGNOR TO S. & S. MACHINE & TOOL (30., A PARTNERSHIP COMPOSED OF GEORGE SCI-IAAB AND .WILLIAM SCHMITZ.

HEATING UNIT FOR PERMANENT HAIR WLAVING.

Application filed May 21, 1925 Serial No.31,898.

This invention relates to electrical heating units for permanent hair waving. Such heating units generally consist of a tubular casing equipped with a heating resistance adapted 'to be applied to a previously prepared coil of hair of the head of the person to be treated. It has been found that these units, as nowconstructed, and which are to be suspended by means of its main leads and a plug from an electric source provided immediately above the head treated, are objectionable because of the difiiculty in handling he same, when in operation, as they becom ver -hot. In fact,-the heat, notwithstanditi t e insulation means used, is so great t at" not only can the unit not be touched by the operator but it is even strongly felt, when coming near the unit with the hand. I a

Another objection is that the heatin units being directly suspended from the soc rets in the ceiling by the leads, the latter, owing to the appreciable weight of a unit and the movements when handling them, have the tendency to become loose and cause ashort circuit, endangering the person treated or at least burning her hair.

The object of my invention is to provide simple means, whereby these objections can Q be obviated.

My invention will be understood. from the following detailed description by reference to the accompanying drawing in which similar references denote corresponding parts and Fig. 1 is an elevation of a heating unit equipped with my new device; Fig. '2 a top p an view thereof and Fig. 3 a vertical section of the upper part of the unit and of my device.

a denotes, the heating unit, which is of well-known construction, the same consistin of tubular heating sections a, a? com taming the electric heating resistances (not shown), which are directly connected to the main leads 1) adapted to be connected by a plug (not shown) to a socket of the electric source generally arranged on the ceiling above the head of the-person treated. Ihese leads are, as usual, fastened to the terminal screws 0 of the electrical resistances, which screws are provided in the cylindrical headpiece fixed to'the top'of the. upper section a and llnade of bakelite or other insulating Inateria 1 6 In handling this unit, the insulated head at the top of the upper section is used as grasp. But as has been stated, the heat gen-" erated in the unit and escaping from within the same renders italmostimpossible to even touch this insulated head, when the unit is 0 in operation. According to my invention, I substitute for the usual head-piece a headpiece 10 also of insulating material made in a form of a cylindrical cup, the bottom 10' of which is provided centrally with an opening 10 to snugly fit over the extended upper end of the internal tube a of the sectiona of the heating unit projecting slightly into the cup as shown in Fig. 3. This cup-shaped head-piece is fixed in position to a ring a 7 usually provided in the section a by screws 11 and also has fixed on its bottom the termjnals 0 for the electric leads I). Adapted to fit in the hollow of the head-piece 10, is

a lid 12 of bakelite or other insulating material consisting of a ring-sha ed portion 12 formed with a reduced annu ar neck 12 projecting downwardl from the inner edge of the ring 12'. The inner diameter of this annular neck is about equal to the outer 30 diameter of the inner tube a of the unit, while the outer diameter is smaller than the diameter of the hollow of the cup, so that, when the lid is positioned within the cup there will be an annular oove 13 forme through which are adapte to extend the inner parts of the leads 6 bearing flatly on the bottom of the cup. The outer diameter of'the'ring shapedlid 12 ismade equal to the diameter of the hollow of the cup, so that 0 i said lid will snugly fit in the latter. When properly positioned and secured in the cup the lower annular face of thelid is adapte -to ress ti htly on the inner parts of the lea s b an practically clamp them in posi- 9 tion within the annular groove 13. Projecting-vertically upwards from the upper face of the annular lid. and constituting an integral'part of said ring, is a beak-shaped uide member 12, whose outer-face is cy- 10 indrically curved and in linear extension of the outer periphery of the ring 12 and whose inner face is similarly curved and in extension of the inner periphery of the same. This beak is formed at its freeend with a lateral projection 12 serving as a grasp,

and with a number of vertical perforations 12" extending through the rin 12' and serve ing as pass-ages for the leads The grasp is formed with a central opening 12: P

through which the surrounding air will circulate to cool the same. The upper and lower faces of the grasp may be roughened to prevent slipping of the fingers. The lid is secured in position by a plurality of lateral screws 14 passed into it through the cup 10 as shown.

Owing to the construction described, the lead wires are securely held within the groove '13 and prevented from becoming loose from the terminals and from'causing a short circuit. The vertical beak or projection 12 serves to guide the lead wires vertically down into the groove 13, so that there will be no direct horizontal pull on the points of their attachment to the terminals. Furthermore the beak being made to extend sufficiently away from the top of the heated unit in conjunction with its air cooled grasp afl'ords convenient means for handling the [unit without subjecting-the operator to the heat radiating or escaping from the unit.

What I claim is In an electric heating unit for permanent hair waving a cup'shaped head piece of insulation material fixed to said unit and formed on its bottom with terminals for the electric leads, a lidof insulation'material snugly fitting in said head piece and formed with a reduced annular neck, to form between itself and the wall of said cup an annular groove for the accommodation of said electric leads, said leads being adapted to be clamped by the lower face of said lid when tightened in position, a guide member integral with and projecting laterally and upwardly from said lid, said member being formed with perforations to serve as guide passages for said leads and with a ring shaped grasp projecting laterally from'said guide. l

WIJLLIAM SOHMITZ.

In testimony whereof I atfix my signature. 

